OS-5192 need faster clock_gettime
Reviewed by: Jerry Jelinek <jerry.jelinek@joyent.com>
Reviewed by: Robert Mustacchi <rm@joyent.com>
Reviewed by: Joshua M. Clulow <jmc@joyent.com>
Reviewed by: Ryan Zezeski <ryan@zinascii.com>

*** 20,29 ****
--- 20,30 ----
   */
  
  /*
   * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
+  * Copyright 2016 Joyent, Inc.
   */
  
  #include <sys/types.h>
  #include <sys/clock.h>
  #include <sys/panic.h>
*** 69,78 ****
--- 70,84 ----
  int hrtime_fake_mt = 1;
  static volatile hrtime_t hrtime_last;
  static hrtime_t hrtime_suspend_time;
  static hrtime_t hrtime_addend;
  
+ volatile uint32_t hres_lock;
+ hrtime_t hres_last_tick;
+ int64_t hrestime_adj;
+ volatile timestruc_t hrestime;
+ 
  /*
   * These functions are used in DTrace probe context, and must be removed from
   * fbt consideration.  Currently fbt ignores all weak symbols, so this will
   * achieve that.
   */